arm64: versal-net: Move board_early_init_r clock setup to mach code

board_early_init_r() programmed the IOU switch clock and the system
timestamp counter directly with readl()/writel() in board code. This is
SoC register setup rather than board policy, and the same block is
duplicated across the Xilinx SoCs.

Move it into versal_net_timer_setup() in arch/arm/mach-versal-net so the
board hook only keeps the EL3 guard and calls the helper.

Signed-off-by: Michal Simek <[email protected]>
Link: https://patch.msgid.link/10dd9f35d03be0402ce13475f20b2cd3761189a6.1782219202.git.michal.simek@amd.com

2 files changed, 45 insertions, 0 deletions

diff --git a/arch/arm/mach-versal-net/cpu.c b/arch/arm/mach-versal-net/cpu.c
index 78ead1f45f6..bce66124c47 100644
--- a/arch/arm/mach-versal-net/cpu.c
+++ b/arch/arm/mach-versal-net/cpu.c
@@ -7,6 +7,8 @@
  */
 
 #include <init.h>
+#include <log.h>
+#include <time.h>
 #include <asm/armv8/mmu.h>
 #include <asm/cache.h>
 #include <asm/global_data.h>
@@ -88,6 +90,47 @@ u64 get_page_table_size(void)
 	return 0x14000;
 }
 
+void versal_net_timer_setup(void)
+{
+	u32 val;
+
+	debug("iou_switch ctrl div0 %x\n",
+	      readl(&crlapb_base->iou_switch_ctrl));
+
+	writel(IOU_SWITCH_CTRL_CLKACT_BIT |
+	       (CONFIG_IOU_SWITCH_DIVISOR0 << IOU_SWITCH_CTRL_DIVISOR0_SHIFT),
+	       &crlapb_base->iou_switch_ctrl);
+
+	/* Global timer init - Program time stamp reference clk */
+	val = readl(&crlapb_base->timestamp_ref_ctrl);
+	val |= CRL_APB_TIMESTAMP_REF_CTRL_CLKACT_BIT;
+	writel(val, &crlapb_base->timestamp_ref_ctrl);
+
+	debug("ref ctrl 0x%x\n",
+	      readl(&crlapb_base->timestamp_ref_ctrl));
+
+	/* Clear reset of timestamp reg */
+	writel(0, &crlapb_base->rst_timestamp);
+
+	/*
+	 * Program freq register in System counter and
+	 * enable system counter.
+	 */
+	writel(CONFIG_COUNTER_FREQUENCY,
+	       &iou_scntr_secure->base_frequency_id_register);
+
+	debug("counter val 0x%x\n",
+	      readl(&iou_scntr_secure->base_frequency_id_register));
+
+	writel(IOU_SCNTRS_CONTROL_EN,
+	       &iou_scntr_secure->counter_control_register);
+
+	debug("scntrs control 0x%x\n",
+	      readl(&iou_scntr_secure->counter_control_register));
+	debug("timer 0x%llx\n", get_ticks());
+	debug("timer 0x%llx\n", get_ticks());
+}
+
 U_BOOT_DRVINFO(soc_xilinx_versal_net) = {
 	.name = "soc_xilinx_versal_net",
 };
diff --git a/arch/arm/mach-versal-net/include/mach/sys_proto.h b/arch/arm/mach-versal-net/include/mach/sys_proto.h
index 23374d10a6b..33253ca88bf 100644
--- a/arch/arm/mach-versal-net/include/mach/sys_proto.h
+++ b/arch/arm/mach-versal-net/include/mach/sys_proto.h
@@ -7,3 +7,5 @@
 #include <linux/build_bug.h>
 
 void mem_map_fill(void);
+/* EL3 clock/timer register setup, called from board_early_init_r() */
+void versal_net_timer_setup(void);